G-Project's G-Boom is pretty easy to sum up: While it may not necessarily be the most attractive-looking portable Bluetooth wireless speaker on the market, it is one of the best values, outputting big sound and big bass for $99.99.
At first glance, the speaker reminded me a little of an IED (improvised explosive device), complete with three LED lights on the front when powered on. However, thanks to the integrated carrying handle, more people will probably think it's some sort of modern riff on a lunchbox. Either way, the G-Boom, which has four drivers (two tweeters, two woofers) and dual bass ports on the back, has some heft to it, weighing in a 5.7 pounds, and is well suited to both indoor and outdoor use.
It seems pretty well built, with a rubberized bottom -- G-Project calls it a "protective elastomer base" -- that helps prevent the speaker from moving around on slicker surfaces. On top of the unit, there's a full set of playback buttons along with a button that allows you to toggle through a series of equalizer presets. (While you tend to control playback from your smartphone or tablet, many people like to have controls on the unit itself in case they set their devices aside, so this is a plus).
You can stream audio from your Bluetooth-enabled device from up to around 30 feet away. On back you'll find a line input for connecting non-Bluetooth audio devices (a 3.5mm cable is included for this purpose). Battery life is rated at 6 hours, which is OK but not great, and you charge the unit with an AC adapter rather than a USB cable (the speaker does not charge via Micro-USB like some smaller speakers do).
There's no built-in speakerphone (no integrated microphone), but the one nice extra is a USB port on the back that you can use to charge your smartphone.
The big story here is the amount of sound you get for the money. Typically, $100 Bluetooth speakers tend to be small (the JBL Flip and UE Mini Boom, for example) and thin on the bass. For $100, you'll be hard-pressed to find another Bluetooth speaker that delivers as much bass as the G-Boom, which goes deeper than the and also plays louder.